After a violent encounter that leaves four Mexican soldiers dead, Hackberry escapes the country in possession of a stolen artifact, earning the ire of a bloodthirsty Austrian arms dealer who then places Hack's son Ishmael squarely in the cross hairs of a plot to recapture his prize, believed to be the mythic cup of Christ. Along the way, we meet three extraordinary women: Ruby Dansen, the Danish immigrant who is Ishmael's mother and Hackberry's one true love; Beatrice DeMolay, a brothel madam descended from the crusader knight who brought the shroud of Turin back from the Holy Land; and Maggie Bassett, one-time lover of the Sundance Kid, whose wiles rival those of Lady Macbeth. In her own way, each woman will aid Hackberry in his quest to reconcile with Ishmael, to vanquish their enemies, and to return the Grail to its rightful place.